Alien and Predator are iconic sci-fi horror franchises that have inspired many must-play games.

John Carpenter delivered a masterclass in mixing sci-fi concepts with growing paranoia in The Thing.

Add Yahoo as a preferred source to see more of our stories on Google. While the buzzy sci-fi series is science fiction (obviously), Dr. Sward says there's plenty of real science peppered throughout.

As a genre, sci-fi is full of memorable and acclaimed classics, but movies like The Matrix and Wall-E go beyond, thanks to their impeccable execution.